Guys for an fyi I am level 47 and a freemium player. My rule of thumb is earn 150 donuts then every 15 after buy homer Buddha. Since i bought witch marge(I regret that now) I am under 150 the farming is because i want the big buildings and the rest of the land. Plus the Christmas update may require me to redo my springfield again. I have less than 50 characters and less than 10 npc's (i think). the squeaky teen and witch marge are my only premium items. But with 400 blue houses @ 1800 = 720,000 cost. 150 every tap daily(24 hrs / 3 taps) = 180,000 a day, for a month 5,400,000 and with the weak booster of 19% that's another 1,026,000 monthly that's 6,426,000 you guys were right about the blue houses.